.app {
  width: 100%;
  height: 100vh;
  background-color: #ffffff;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.text71 {
  font-weight: 600;
  font-size: 18px;
  color: transparent;
  letter-spacing: 4px;
  margin: 0;
  padding: 0 16px;
  background: linear-gradient(to right, #000 0, #ffff00 20%, #000 40%);
  background-position: -32px 0;
  -webkit-background-clip: text;
  animation: eff71 3s linear infinite;
}
@keyframes eff71 {
  to {
    background-position: 130px 0;
  }
}
